Boiler-covering.



PATENTED SEPT. 17, 1907.

E. L. STORY. BOILER COVERING. APPLICATION FILED MAR. 23, 1907.

2 SHEETSSHEET l.

PATENTED SEPT. 17, 1907.

E. L. STORY.

BOILER COVERING.

APPLICATION FILED MAR. 23, 1907.

2 SHEETS-SHEET 2.

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UNITED STATES PATENT. OFFICE.

' EDWARD L. STORY, OF EVERETT, MASSACHUSETTS.

BOILER-COVERING.

poses without removing the entire covering of the boiler. I

It has heretofore been proposed to make the entire covering of a boiler in removable sections to facilitate inspection of the boiler. But as a usual thing it is necessary to inspect z nly the seams or at most a small part of the boiler surface, and to make the entire covering of the boiler in sections, any one of which is removable, involvesa good deal of expense.

According to my invention I cover all parts of the boiler with the exception of the places where it is desired to inspect the same with a stationary permanent covering such as is usually employed around boilers;

andI make the portion of the covering which covers the parts of the boiler that it is desired to inspectremovable so that access to these parts of the boiler can be readily secured. I have alsoprovided a novel construction for the removable sections of the covering, all as will be more fully hereinafter described and then .pointed out in the appended claims. I

In the drawings I have shown my invention as ap-.

- Fig. 1; Fig. 4 is a vertical section through a Manning boiler having my improvements applied thereto; and Fig. 5 is a section on the line a-a Fig. 4.

Referring to Fig. 1, 3 is an ordinary horizontal boiler supported on the usual brick setting 4. This boiler is shown as having butt seams, but so far as my invention is concerned the boiler might have either lap or butt seams. In constructing a horizontal boiler it is common to make it of several sections 5, 6 and 7, for in-v stance, of sheet metal, which are connected together by girth-seams 8. The edges of each section are connected at 9 by either butt or lap seams; and the seams 9 of adjacent sections are usually arranged out of line with each other, as best seen in Fig. 1. In the butt seams shown in the drawings 10 and 11'are the two welt strips which overlie the meeting edges 12 of the shell of the boiler. In inspecting a boiler of this type it is the seams between the edges 12 of each section of the boiler that need inspection most, and ac- Specification of Letters Patent.

Application filed larch 23.1907- Saris-1N0. 364,058.

Patented Sept. 17, 1907.

cordingly I propose to cover the rest of the boiler with a permanent covering 13 of any suitable material, and to provide removable sections 14 over the seams which it is desired to inspect. As herein shown these removable sections 14 are made with a backing member 15 on which rests a body 1'7, of fire-felt, asbestos, or some other non heat-conducting material, and this body is provided with a surface of cement. I prefer first to put a layer 18 of magnesia cement directly on the body 17,.and then to use a surface layer 19 of Portland eement or some other cement which will make a hard waterproof surface for the section. The'edges of the backing 15 are bent upwardly, as at 16, and preferably b'ent inwardly slightly, as at 20. i

In making the section the body 17 of fire-felt, which usually comes in blocks, is placedon the backing 15,

the sides 16 of the backing having previously been bent up as herein shown, and then a layer 18 of magnesia cement is poured on top of the body 17, and when it is sufficiently dry the surface layer 19 of Portland cement is applied.- As the cement is applied it runs around the inwardly-bent edges 20 of the backing so that when the cement hardens the backing and firefclt are all tied together. This construction has the advantage" that the removable section of the cover may be made in place. vThat is, the boiler, with the exception of the space directly over the seams, may be covered with the permanent covering 13, and then the backing member 15 may be cut to the proper shape to fit the various openings left over the seams, and the removable sections 14 formed directly in the openings. In this way it is possible to readily make removable sections for any type of boiler and to make the sections of any desired shape.

In Figs. 4 and 5 I have shown my invention applied to what is known as the Manning boiler. The

Manning boiler is an upright boiler having the skirt 25 surrounding the fire-box 26 and forming one wall of the usual water leg 27, and the waist portion 28 of smaller diameter than the skirt and forming the shell of the boiler through which the usual fiues 29 pass. The skirt and the waist are connected by the ogee ring 30, and this ogee ring is relied upon to take up expansion and contraction. This is the part of the Manning boiler which is most apt to crack and which needs inspection, and in accordance with my invention I make the covering which surrounds the ogee ring 30 removable, while the covering 31 and 32 which surrounds theskirt and waist of the boiler is permanently attached. The covering 32 around the waist of the boiler may be supported-on an angle iron support 33 or in any suitable way; The portion of the covering which surrounds the ogee ring 30 is made in sections there being four or more of such sections as desired. Each section has the backing 34 of wire mesh, the body 35 of asbestos, fire-felt, or some similar material and the surface of cement, said surface preferably being made of two layers an inner one 36 of magnesia cement and an outer layer 37 of Portland cement. The edges 38 of the wire mesh are bent upwardly and embedded in the cement as in the other embodiment of my involition.

Having fully described my invention, what I claim as new and desire to secure by; Letters Patent is:.

1. A boiler covering having a removable section pro-- senting a backing oi. wire mesh, a body portion of nonheat-conducting material applied to one side only. of said backing, and a surface coating of hard non-metallic waterproof material the edges of said backing embracing the body portion and being interlocked with said waterproof material.

2. The combination witha boiler, of a covering permanently secured to all parts thereof except those which it is desired to inspect, and covering sections removably secured to said portions to whlch access is desired, said covering sections each presenting a backing of wire mesh, a body portion of non-heat-conducting material applied to one side only of said backing, and a surface coating "of cement, the backing being bent outwardly at the sides of the section to embrace the body portion, and the edges of the backing being embedded in the cement whereby said hacking permanently holds the body .portion and ce ment together.

3. The combination with a boiler, of a covering therefor having a removable section, saidsection comprising a backing of wire mesh, a body of non-heat conducting material applied toone side only of the backing, and a coating of Portland cement, the edges of said backing being embeddedin the.cement whereby said backing ties the cement coating and body together.

4. In a boiler covering, a removable section having 0. body portion of fire-felt, a layer of magnesia cement, and an outer layer or surface coating of Portland cement.

5. A boiler covering provided with a removable section having a backing of wire mesh, :1 body portion of.fire-felt, a layer of magnesia cement covering the fire-felt, and an outer layer of Portland cement, the edges of the wire fabric being embedded in the cement.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

EDWARD L. STORY.

Witnesses 1 Louis C. SMITH,

EVANGELINE C. BROWN. 

